Fsc Part 1 Chemistry MCQ's Test For Full Book With Answers

Fsc Part 1 Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1

Which of the following materials is an example of an amorphous solid

 <p>Glass&nbsp;</p> <p>Ice</p> <p>Diamon</p> <p>Sodium Chaloride</p>
2

amorphous solids are typically

 <p>Rigid and hard</p> <p>Found in lump or fine powder form</p> <p>Have a shrp melting point</p> <p>Always&nbsp; crystalline in structure</p>
3

The shape in which a crystal usually grows is called its.

 <p>Habit</p> <p>Crystal lattice</p> <p>Melting Point</p> <p>Cleavage plane</p>
4

When a crystalline solid is broken, it does so along specific planes, Theseplanes are kown as.

 <p>Cleavage planes</p> <p>Crystal faces</p> <p>Surface planes</p> <p>Growth planes</p>
5

Which of the following  is a charcteristic of cyrstalline solids.

 <p>They do not have a definite geometrical shape</p> <p>They melt over a wide temerature range</p> <p>They have asharp melting point</p> <p>Their properties do not depend on the directionof measurement</p>
6

In Solids the particles miainly have which type of motion

 <p>Translatory motion&nbsp;</p> <p>Vibratory motion</p> <p>Rotatray motion&nbsp;</p> <p>Random Motion&nbsp;</p>
7

What happens to the particles in a solid when the temperature increases.

 <p>They move closer to each other</p> <p>Their vibrational motion increases</p> <p>They start moving freely</p> <p>The solid melts</p>
8

Why  is the compression of solids not possible

 <p>The particles are fixed in place and cannot move closer</p> <p>Their particles are widely spaced</p> <p>The partiles are charged</p> <p>Solids are made of gases</p>
9

How does heat of vaporization affect matter.

 <p>Cause&nbsp; decrease in kinetic energy</p> <p>Incresses particle motion and separes tham into gas phase</p> <p>Decresease freedom of particles</p> <p>Strengthens intermolecular forces</p>
10

Which of the followng has the lowest molar hat of vaporization.

 <p>HCl</p> <p>Water</p> <p>NH3</p> <p>Ethanol</p>
11

What is the role of a pressur ecooker in boiling water.

 <p>It lowers atmospheric pressure</p> <p>It allows water to evaporate quickly</p> <p>It increases external pressure raising boiling point</p> <p>It cools the steam</p>
12

Why does water boil at 69 oC on Mount Everest

 <p>Due to hgih temperature</p> <p>Due to low vapour pressure</p> <p>Due to low external pressure</p> <p>Due to presence of snow</p>
13

What is the effect of decresing external pressur eon boiling point of a liquid.

 <p>It increases</p> <p>It remains constant</p> <p>It decrease</p> <p>It fluctuates</p>
14

When does a liqudi start boiling.

 <p>When temperatur reahes 100 oC</p> <p>When its vaporu pressur eequals atmospheric pressure</p> <p>When all molecules turn into vapour</p> <p>When surface tension becomes zero</p>
15

Why does aceton feel colder than water when pured on skin.

 <p>It absorb moisture</p> <p>It has lower boiling point and evaporates faster</p> <p>It rreacts with skin</p> <p>It is more viscous</p>
16

Why does acetone feel colder than water when poured on skin.

 <p>It reacts with skin</p> <p>It has lower boiling point and evaporate faster</p> <p>It is more viscous</p> <p>It absorbs moisture</p>
17

At equilibrium in a closed system, which two processes occur at tha same rate.

 <p>Mellting and Freezing&nbsp;</p> <p>Evporation and condensation&nbsp;</p> <p>Sublimation and condensation&nbsp;</p> <p>Evaporation and boiling</p>
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